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'Mystery' hoses on carburetor (Read 74 times)

Mattdw

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'Mystery' hoses on carburetor
08/25/08 at 21:54:18

While removing my carburetor I noticed 2 'mystery' hoses on the back side of the carb (side toward the rear of the cycle). Neither was connected to anything so I'm assuming they are breather hoses?
The weird thing is that the end of one of them was flared, as if it was at one time connected to a fitting somewhere, but is no longer.

Any observations or info would be greatly appreciated.

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verslagen1

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Re: 'Mystery' hoses on carburetor
Reply #1 - 08/25/08 at 22:37:00

Those 2 hoses (symmetrical about the centerline) are bowl vent tubes.

Usually they're routed up into the opening in the frame just above the carb. I suppose, if your bike flipped over, the gas would run up into the frame instead of up your nose.

Read Savage Wahine's wonderful carb cleaning post, things will become less mysterious.

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skrapiron -FSO Serious Thumper Offline Instant Human.... Just add coffee.. Posts: 1456 Pittsburgh, Pa Gender:	Re: 'Mystery' hoses on carburetor Reply #2 - 08/26/08 at 05:40:58 They're there to relieve vapor pressure caused by gas evaporating from the float bowl. Not so mysterious afterall.
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Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: 'Mystery' hoses on carburetor Reply #3 - 08/26/08 at 07:52:54 verslagen1 wrote on 08/25/08 at 22:37:00: Those 2 hoses (symmetrical about the centerline) are bowl vent tubes. Kinda what I figured, I was just confused because the end of one of them was flared.
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photojoe FSO Serious Thumper Alliance Member Offline I did warn you to brace yourself Posts: 1379 New Jersey Gender:	Re: 'Mystery' hoses on carburetor Reply #4 - 08/26/08 at 07:57:06 I came across one when I broke down, didn't know what it was for. Looked for where it may have been attached, but saw nothing. Looked at a few carb diagrams, the only reference I saw was the California model had a hose to nowhere. Now we know.
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